Deck Building Cost in Bismarck, ND (2026)
Updated October 2026 · Bismarck, ND · index 0.97
How much does it cost to build a deck in Bismarck? For a 300 sq ft deck with pressure-treated wood, homeowners in Bismarck, ND pay about $10,900 on average, and most quotes land between $7,550 and $14,300 — $25 to $48 per sq ft. The price covers plans and the permit, footings, a framed and flashed structure, the deck boards, railing, one set of stairs, fascia and cleanup.
The deck building price in Bismarck runs 3% below the U.S. average: construction labor in the Bismarck area runs 4% below the national mean, materials 1% below. The same job averages $11,300 nationally and about $11,400 at the North Dakota statewide index.
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Deck building price in Bismarck by decking material
What a 300 sq ft deck costs in Bismarck with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$36 per sq ft | $10,900$7,550 – $14,300 |
| Capped compositehidden fasteners and a picture-frame border$44 per sq ft | $13,100$9,300 – $16,900 |
The least expensive option in Bismarck is pressure-treated wood, at about $10,900; capped composite averages $13,100, 1.2 times as much.
Cost to build a deck in Bismarck by size
With pressure-treated wood, priced for Bismarck, ND:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$39 per sq ft | $7,850$5,350 – $10,300 |
| A 300 sq ft deck$36 per sq ft | $10,900$7,550 – $14,300 |
| A 400 sq ft deck$35 per sq ft | $14,000$9,750 – $18,200 |
Some costs stay the same whatever the size — plans, permit and layout, one set of stairs (4 steps), final inspection and cleanup — so a bigger job costs less per unit: $35 per sq ft for a 400 sq ft deck against $39 for a 200 sq ft deck.
What a deck building in Bismarck includes
Line by line, the $10,900 average for a 300 sq ft deck breaks down like this: 47% labor, 53% materials and equipment.
| Line | Low – high |
|---|---|
| Plans, permit and layout | $360 – $1,050 |
| Ground prep, fabric and gravel | $210 – $540 |
| Footings below the frost line | $400 – $800 |
| Flashed ledger on the house | $240 – $470 |
| 6x6 posts | $270 – $540 |
| Beams | $240 – $470 |
| Joist framing with hangers | $1,400 – $2,350 |
| Deck boards | $1,300 – $1,950 |
| One set of stairs (4 steps) | $500 – $1,000 |
| Railing | $1,850 – $3,200 |
| Fascia and skirting | $350 – $830 |
| Final inspection and cleanup | $140 – $360 |
| Stain and seal, two coats | $320 – $750 |
Each line is the price book's U.S. rate for that step, scaled by 0.74 to the installed price published sources give for the whole job (see how these prices are built), times Bismarck's index of 0.97; permit fees are not scaled.
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What affects deck building prices in Bismarck
Labor and materials in Bismarck
Construction wages in the Bismarck metro run 3% below the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that down by 1%, to 4% below the national mean. Materials in the area's ZIP codes price 1% below the national average. Together they give Bismarck a construction cost index of 0.97.
Where Bismarck sits in North Dakota
Bismarck is the 4th most expensive of the 4 North Dakota cities in our index, against a statewide index of 1.01. Fargo is the dearest at 1.00; no North Dakota city in it costs less.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Bismarck ranks 188th from the most expensive. The job that averages $10,900 here averages $11,300 at the national rate.
The deck code in North Dakota
Decks here are built to the North Dakota State Building Code (2024 IRC with North Dakota amendments). Guards are required at 36 in. where the deck is more than 30 in. up, and stair risers can be up to 8 in. A free-standing deck need not have footings below the frost line (R507.3 amendment).
What decks are built of in North Dakota
Most used on decks in the Plains states: treated pine, then capped composite, then cedar.
Sales tax in North Dakota
North Dakota's base state sales tax is 5%, and cities and counties can add their own. How it applies to a home-improvement contract varies, so ask whether a quote includes it. Prices on this page are before tax.
What a Bismarck contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other North Dakota cities
A 300 sq ft deck with pressure-treated wood averages $10,900 in Bismarck; $11,300 in Fargo, $11,000 in Grand Forks, $11,000 in Minot.
| City | Average · range |
|---|---|
| Fargo, ND3% more | $11,300$7,800 – $14,700 |
| Grand Forks, ND1% more | $11,000$7,650 – $14,400 |
| Minot, ND1% more | $11,000$7,650 – $14,400 |
deck building price in Bismarck: questions
How much does it cost to build a deck in Bismarck, ND?
About $10,900 for a 300 sq ft deck with pressure-treated wood, and most Bismarck quotes fall between $7,550 and $14,300. That is 3% below the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Bismarck?
$25 to $48 per sq ft, about $36 on average with pressure-treated wood. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 400 sq ft deck in Bismarck?
$9,750 to $18,200, about $14,000 on average, with pressure-treated wood — $35 per sq ft.
Do you need a permit for deck building in Bismarck?
Yes — a new deck needs a permit nearly everywhere, Bismarck included. In North Dakota, decks follow the North Dakota State Building Code (2024 IRC with North Dakota amendments). The prices on this page carry $360–$1,050 for plans, permit and layout.
Does the price include sales tax in North Dakota?
No. The prices here are before tax; North Dakota's base state rate is 5%, plus any local rate.
What decking do people choose in North Dakota?
Most used on decks in the Plains states: treated pine, then capped composite, then cedar.
Other home projects in Bismarck
Deck building cost in North Dakota
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The deck building is priced step by step, then multiplied by Bismarck's construction cost index of 0.97.
Where the price book's steps for an option add up to more than 20% over the installed price a published source gives for the whole job, every step but a permit fee is scaled down to the middle of that range: pressure-treated wood × 0.74 (HomeGuide 2026: $25–$50 per sq ft); capped composite × 0.80 (Ergeon 2026: $30–$60 per sq ft).
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for Bismarck, each on its own base: HUD 0.98, Craftsman 0.99. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Bismarck build quotes like these with JobFlex's Deck Studio.
- HomeGuide 2026: pressure-treated deck $25-$50/sqft installed, labor $15-$30/sqft
- Ergeon 2026: composite deck $30-$60/sqft installed
- HomeGuide 2026: composite railing $25-$60/lf, aluminum $50-$200/lf installed